dilemma

I have a cyber stalker.  Seriously.  One of my ex-boyfriends has hacked into my email several times, and even had the nerve to set up mail forwarding to him-so that all of the emails sent to me would also be forwarded to him.  Psycho I know.  But despite my asking him to leave me alone, and to stop checking my blog, he still checks my blog all the time!  So here's the question, I'd like to just block the computers he uses from accessing my blog.  Is that possible?  I don't want to go totally private, because I love the convenience of things like google reader, and really only remember to check my friends private blogs every now and then.  I assume there are other people like me who understand why people go private, but love ease of checking non-private blogs.  Do I let one person ruin it for everybody else?  Oh....what to do?